Surgical knife



FIG. 1 is a perspective view of a surgical knife, showing my new design;

FIG. 2 is a left view thereof;

FIG. 3 is a right view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear end view thereof;

FIG. 7 is a front end view thereof; and,

FIG. 8 is a perspective view of the surgical knife of FIG. 1 with the blade retainer in an alternate open position.

The portions of the figures depicted in dotted lines has been shown for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a surgical knife, as shown and described. 